JPS6255495B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for joining a multi-layer board consisting of a thermoplastic synthetic resin layer and a glass fiber reinforced plastic layer.

[Background of the invention]

This type of multi-layer board has high chemical resistance and mechanical strength because chemical resistance is obtained by the thermoplastic synthetic resin layer and mechanical strength is obtained by the glass fiber reinforced plastic layer. It is a major plastic material that is used heavily for large tanks and the like.

For such large products, a manufacturing method is often adopted in which the product is manufactured by dividing into an upper half and a lower half, and then the upper half and the lower half are joined together.

[Conventional technology]

Conventionally, large tanks of this type have been made of only a layer of glass fiber reinforced plastic, but when joining such upper and lower halves, the joint ends are brought together and a layer of gel coat resin is used. A method of fixing using a resin-impregnated glass fiber layer or the like was used.

[Problem that the invention seeks to solve]

However, in such a method, fixing is not performed until the resin hardens, and during that time, it is necessary to firmly support the joint ends so that they do not move relative to each other. It becomes extremely difficult to support the product so that it does not move for such a long period of time, especially the larger the product is.

[Means for solving problems]

The object of the present invention is to improve the above-mentioned conventional drawbacks and provide a method for joining the above-mentioned multi-layer plates, which is extremely useful when assembling large tanks etc. using the above-mentioned multi-layer plates. Utilizing the structure of a multi-layer board consisting of a thermoplastic synthetic resin layer with high chemical properties and a glass fiber-reinforced plastic layer with excellent mechanical strength, the glass fiber-reinforced plastic is used near the joint ends of the multi-layer board. The layer is peeled off or not provided in advance to form a single layer structure of only the thermoplastic synthetic resin layer, and the joining ends of the thermoplastic synthetic resin layer are joined together and a welding rod made of thermoplastic synthetic resin is used from both sides. The main idea is to perform temporary fixation by welding, and then to laminate a glass fiber reinforced plastic layer on the surface of the thermoplastic synthetic resin layer near the joint end.

〔Example〕

The present invention will be explained with reference to an embodiment shown in the drawings.

This example relates to tank manufacturing. In the figure, a tank 1 is made of a multi-layered board whose inner surface is a layer 11A of thermoplastic synthetic resin such as vinyl chloride, polyethylene, polypropylene, polyfluorinated ethylene, etc., and whose outer surface is a layer 11B of glass fiber reinforced plastic such as glass fiber reinforced polyester. The manhole 2A, nozzles 1N, 2N, 3N, etc. are inserted into an upper part 1A and a lower part 1B, which are manufactured separately.
In order to manufacture the tank 1 separately into the upper part 1A and the lower part 1B, there are two methods: First, the upper part and the lower part of the tank 1 are manufactured in one piece, and then they are cut into the upper part 1A and the lower part 1B. There is a method of manufacturing the lower part 1B separately. Upper 1A and lower 1
The joint ends of B, that is, the lower edge 1'A of the upper part 1A and the upper edge 1'B of the lower part 1B, have a single-layer structure with only the thermoplastic synthetic resin layer 11A without the glass fiber reinforced plastic layer 11B. shall be. For example, when the upper and lower parts of the tank 1 are manufactured integrally and then cut into the upper part 1A and the lower part 1B, the lower edge 1'A of the upper part 1A and the upper edge 1' of the lower part 1B, which are the joining ends. B also has glass fiber reinforced plastic layer 1
In this case, the glass fiber reinforced plastic layer 11B near the joint end is peeled off to expose the thermoplastic synthetic resin layer 11A. Further, when the upper part 1A and the lower part 1B of the tank are manufactured separately, the glass fiber reinforced plastic layer 11B is not provided in advance near the joint end.
In this way, by forming the joint ends of the upper part 1A and the lower part 1B into a single layer structure of only the thermoplastic synthetic resin layer 11A, temporary fixation from the inside and outside using a welding rod to be described later becomes possible. Bolt holes 3A are provided near the joint edges of the upper part 1A and lower part 1B, respectively.
Wrap angle 3 of the split and at the same time mark 4
Perform A and 4B.

Next, as shown in FIG.
is suspended by the crane 6 and positioned above the lower part 1B, and while aligning the alignment marks 4A and 4B, the upper part 1A is lowered and held with a slight gap left between it and the lower part 1B. As shown in FIG. 2, a through bolt 7 is fixed between the angles 3 of the upper part 1A and the lower part 1B with a span nut 7A through the bolt hole 3A, and then the crane 6 is removed from the upper part 1A.

After removing the crane 6, by rotating the nut 7A to which the through bolt 7 is fixed, the upper part 1A is gradually lowered and joined to the lower part 1B, as shown in FIGS. 4 and 5. When the guide tool 8 is used in this way, the upper part 1A descends without wobbling, and the upper part 1A and the lower part 1B are accurately joined. In the guide tool 8, 8A is a support plate, a frame body 8B is provided protruding from the center part, and a wedge-shaped support rod 8 is installed in the frame body 8B.
C is loosely inserted. Using such a guide tool 8,
The upper part 1 is passed between the upper part 1A and the lower part 1B, and the husband's wall is held between the support plate 8A and the support rod 8C.
If A is lowered, the lowering of upper part 1A will be caused by support plate 8A.
The upper part 1 is guided by the gap between the support rod 8C and
The joint ends of A and lower part 1B are joined accurately.

After joining the joint ends of the upper part 1A and the lower part 1B, the guide tools 8 are sequentially removed and the thermoplastic synthetic resin layer 11A is formed at the joint part 1C of the upper part 1A and the lower part 1B.
They are temporarily fixed to each other by welding from the inside and outside with a welding rod 9 made of thermoplastic synthetic resin. Such temporary fixing is performed by cooling the welded portion, and the time required for temporary fixing is extremely short. After temporary fixing, as shown in Fig. 7, the lower edge 1'A of the upper part 1A and the upper edge 1'B of the lower part 1B, which are made of a single layer structure of the thermoplastic synthetic resin layer 11A including the joint part 1C, are inspected from the outside. a bolt 7 reinforced with a glass fiber reinforced polyester reinforcing layer 10;
If the angle 3 is removed, the state shown in FIG. 8 will be obtained. Furthermore, if desired, the inner surface of the joint 1C is permanently welded, and after a pinhole test of the welded part, the nozzle 2C and other parts are attached to the lower part 1B, and a painting finish is applied.

The finished product is then loaded onto a dedicated transport vehicle within the factory where it is to be installed, transported to the designated installation location, lowered to the installation location, and anchored to the foundation 11 of the installation location using anchor lugs 12 as shown in FIG. , fixed with anchor bolts.

It goes without saying that, in addition to the above-mentioned embodiments, the present invention can also be applied to bonding of flat plates.

[Action/Effect]

As described above, the present invention provides a multi-layer board consisting of a thermoplastic synthetic resin layer with high chemical resistance and a glass fiber reinforced plastic layer with excellent mechanical strength. Because it has a single-layer structure with only a thermoplastic synthetic resin layer, either by peeling it off or not providing it in advance, the joint can be welded from both the inside and outside using a welding rod made of thermoplastic synthetic resin, and it is temporarily fixed. Since this is carried out quickly and reliably, it is easy to support the members, and the glass fiber reinforced plastic layers can be laminated at the joints safely and smoothly, making it extremely useful especially in the manufacture of large tanks and the like.

[Brief explanation of the drawing]

Figure 1 is a front view of the tank divided into two parts, Figure 2 is a plan view of the lower part, Figure 3 is a front view of the upper part of the tank positioned above the lower part of the tank by crane, and Figure 4 is the tank connection. 5 is a perspective view of the guide, FIG. 6 is a sectional view of a joint temporarily fixed, and FIG. 7 is a sectional view of a joint partially reinforced on the outside with a fiber-reinforced plastic layer. FIG. 8 is a perspective view of the assembled tank, and FIG. 9 is a front view of the tank installed. In the figure, 11A...thermoplastic synthetic resin layer, 11B...
...Glass fiber reinforced plastics layer, 9...Welding rod.

Claims (1)

[Claims] 1 In a multi-layer board consisting of a thermoplastic synthetic resin layer and a glass fiber-reinforced plastic layer, the glass fiber-reinforced plastic layer may be peeled off or removed in the vicinity of the joint end, or a single thermoplastic synthetic resin layer may be formed without providing it in advance. The joined ends of the thermoplastic synthetic resin layers are brought together and temporarily fixed by welding from both sides using a welding rod made of thermoplastic synthetic resin, and then the thermoplastic synthetic resin layer near the joined ends is A method for joining synthetic resin multilayer boards, which comprises laminating a glass fiber-reinforced plastic layer on the surface of the board.